using System;
using System.ComponentModel;
using System.Drawing;
using System.Windows.Forms;

using System.Drawing.Design;
using System.ComponentModel.Design;

namespace Dotnetrix_Samples
{
    /// 

    /// Summary description for ImageCombo.
    /// 

    public class ImageCombo : System.Windows.Forms.ComboBox
    {
        /// 
 
        /// Required designer variable.
        /// 

        private System.ComponentModel.Container components = null;

        public ImageCombo()
        {
            // This call is required by the Windows.Forms Form Designer.
            InitializeComponent();

            // TODO: Add any initialization after the InitializeComponent call
            base.DrawMode = DrawMode.OwnerDrawVariable;

        }

        /// 
 
        /// Clean up any resources being used.
        /// 

        protected override void Dispose( bool disposing )
        {
            if( disposing )
            {
                if(components != null)
                {
                    components.Dispose();
                }
                if (this.Items != null)
                {
                    foreach (Object o in this.Items)
                    {
                        if (o is ImageComboItem)
                            ((ImageComboItem)o).Dispose();
                    }
                }
            }
            base.Dispose( disposing );
        }

        #region Component Designer generated code
        /// 
 
        /// Required method for Designer support - do not modify 
        /// the contents of this method with the code editor.
        /// 

        private void InitializeComponent()
        {
            components = new System.ComponentModel.Container();
        }
        #endregion

        private int currentIndex = -1;

        [Browsable(false), EditorBrowsable(EditorBrowsableState.Never)]
        public new DrawMode DrawMode
        {
            get{return DrawMode.OwnerDrawFixed;}
        }


        [Editor(typeof(ImageComboItemEditor), typeof(UITypeEditor))]
        [DesignerSerializationVisibility(DesignerSerializationVisibility.Content)]
        public new ObjectCollection Items
        {
            get{return base.Items;}
        }


        private class ImageComboItemEditor : CollectionEditor
        {
            public ImageComboItemEditor(Type type):base(type){}

            protected override Type CreateCollectionItemType()
            {
                return typeof(ImageComboItem);
            }


        }


        protected override void OnDrawItem(DrawItemEventArgs e)
        {
            if (e.Index == -1 || e.Index > this.Items.Count - 1)
                return;

            e.DrawBackground();

            Rectangle imageRect = new Rectangle(e.Bounds.X, e.Bounds.Y, e.Bounds.Height, e.Bounds.Height);
            RectangleF textRectF = RectangleF.FromLTRB(imageRect.Right + 2, e.Bounds.Top, e.Bounds.Right, e.Bounds.Bottom);
            
            if (Items[e.Index] is ImageComboItem )
            {
                ImageComboItem Item = (ImageComboItem)Items[e.Index];
                
                if (Item.Image != null)
                    e.Graphics.DrawImage(Item.Image, imageRect);
            }

            SolidBrush TextBrush = new SolidBrush(this.ForeColor);
            if ((e.State & DrawItemState.Selected) == DrawItemState.Selected)
                TextBrush.Color = SystemColors.HighlightText;

            StringFormat sf = new StringFormat(StringFormatFlags.NoWrap);
            sf.LineAlignment = StringAlignment.Center;
            sf.Trimming = StringTrimming.EllipsisCharacter;

            e.Graphics.DrawString(Items[e.Index].ToString(), this.Font, TextBrush, textRectF, sf);
            TextBrush.Dispose();
        }

        protected override void OnSelectedIndexChanged(EventArgs e)
        {
            if (this.SelectedIndex != this.currentIndex)
            {
                this.currentIndex = this.SelectedIndex;
                base.RefreshItem(this.SelectedIndex);
            }
            else
            {
                base.OnSelectedIndexChanged (e);
            }

        }

    }

    [DesignTimeVisible(false)]
    public class ImageComboItem : Component
    {

        private Object m_object;
        private Image m_Image;

        [TypeConverter(typeof(StringConverter))]
        public Object Item
        {
            get{return m_object;}
            set{m_object = value;}
        }

        public Image Image
        {
            get{return m_Image;}
            set{m_Image = value;}
        }

        public override string ToString()
        {
            if (m_object == null)
                return String.Empty;
            else
                return m_object.ToString();
        }


    }

}